NissanPartsDeal.com offers the wholesale prices for genuine 2020 Nissan Altima parts. Parts like Alternator are shipped directly from authorized Nissan dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 4 Cyl 2.0 L GAS, 4 Cyl 2.5 L GAS. Grade/Trim: Platinum, S, SL, SR, SV.